diff --git a/build.sbt b/build.sbt
index 9c5eb056d..a0cd9881c 100644
--- a/build.sbt
+++ b/build.sbt
@@ -32,7 +32,7 @@ lazy val scalaNativeSettings = Def.settings(
   Test / envVars ++= Map("S2N_DONT_MLOCK" -> "1")
 )
 
-val Scala212 = "2.12.19"
+val Scala212 = "2.12.20"
 val Scala213 = "2.13.15"
 ThisBuild / crossScalaVersions := Seq(Scala213, "3.3.4")
 ThisBuild / scalaVersion := Scala213 // the default Scala
diff --git a/sdk-exporter/common/src/main/scala/org/typelevel/otel4s/sdk/exporter/otlp/grpc/GrpcCodecs.scala b/sdk-exporter/common/src/main/scala/org/typelevel/otel4s/sdk/exporter/otlp/grpc/GrpcCodecs.scala
index f2ca65e30..65756cbbb 100644
--- a/sdk-exporter/common/src/main/scala/org/typelevel/otel4s/sdk/exporter/otlp/grpc/GrpcCodecs.scala
+++ b/sdk-exporter/common/src/main/scala/org/typelevel/otel4s/sdk/exporter/otlp/grpc/GrpcCodecs.scala
@@ -47,7 +47,7 @@ private[otlp] object GrpcCodecs {
         }
       }
 
-    _.through(lpmDecoder).through(decompress).through(entityDecoder)
+    s => s.through(lpmDecoder).through(decompress).through(entityDecoder)
   }
 
   def encode[F[_]: RaiseThrowable: Compression, A](
@@ -63,12 +63,13 @@ private[otlp] object GrpcCodecs {
     val lpmEncoder: Pipe[F, LengthPrefixedMessage, Byte] =
       StreamEncoder.once(LengthPrefixedMessage.codec).toPipeByte
 
-    _.through(entityEncoder)
-      .through(compression)
-      .chunks
-      .foldMonoid
-      .map(chunks => LengthPrefixedMessage(gzip, chunks.toByteVector))
-      .through(lpmEncoder)
+    s =>
+      s.through(entityEncoder)
+        .through(compression)
+        .chunks
+        .foldMonoid
+        .map(chunks => LengthPrefixedMessage(gzip, chunks.toByteVector))
+        .through(lpmEncoder)
   }
 
 }